Whirlpool tub



FIG. 1 is a perspective view of a whirlpool tub showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a side elevational view, the opposite side being a mirrorimage thereof;

FIG. 5 is a back view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for a whirlpool tub, as shown and described.